From owner-freebsd-arch@FreeBSD.ORG  Wed Mar 16 08:50:30 2005
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To: Peter Jeremy <PeterJeremy@optushome.com.au>
From: "Poul-Henning Kamp" <phk@phk.freebsd.dk>
In-Reply-To: Your message of "Wed, 16 Mar 2005 19:41:06 +1100."
             <20050316084106.GC28328@cirb503493.alcatel.com.au> 
Date: Wed, 16 Mar 2005 09:50:22 +0100
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cc: arch@freebsd.org
Subject: Re: Freeing vnodes. 
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In message <20050316084106.GC28328@cirb503493.alcatel.com.au>, Peter Jeremy wri
tes:
>On Tue, 2005-Mar-15 11:11:32 -0800, Matthew Dillon wrote:
>>    syncer:	  I've always wanted to rewrite the syncer to be per-mount
>>		  or per-physical-device so it could sync out to multiple
>>		  physical devices simultaniously. 
>
>My current bitch with syncer is that it can run for up to around 8msec
>(on an AMD XP-1800).  This screws up interrupt latency.

And throw thousands of I/O requests on the queue at once, which screws
up I/O performance.

-- 
Poul-Henning Kamp       | UNIX since Zilog Zeus 3.20
phk@FreeBSD.ORG         | TCP/IP since RFC 956
FreeBSD committer       | BSD since 4.3-tahoe    
Never attribute to malice what can adequately be explained by incompetence.